docs: def collect_compare_into(left, right, added, removed, altered, same):
      """
      collects the differences between left and right, which are
      filenames for valid zip files, into the lists added, removed,
      altered, and same.  Returns a tuple of added, removed, altered,
      same
      """
  
      with open_zip(left) as l:
          with open_zip(right) as r:
              return collect_compare_zips_into(l, r,
                                               added, removed,
                                               altered, same)